Ralph Radach | Florida State University (original) (raw)
Papers by Ralph Radach
Brain research, Jan 24, 2016
Computational models of word recognition already successfully used associative spreading from ort... more Computational models of word recognition already successfully used associative spreading from orthographic to semantic levels to account for false memories. But can they also account for semantic effects on event-related potentials in a recognition memory task? To address this question, target words in the present study had either many or few semantic associates in the stimulus set. We found larger P200 amplitudes and smaller N400 amplitudes for old words in comparison to new words. Words with many semantic associates led to larger P200 amplitudes and a smaller N400 in comparison to words with a smaller number of semantic associations. We also obtained inverted response time and accuracy effects for old and new words: faster response times and fewer errors were found for old words that had many semantic associates, whereas new words with a large number of semantic associates produced slower response times and more errors. Both behavioral and electrophysiological results indicate tha...
Scientific Studies of Reading, Jan 28, 2015
Sprache · Stimme · Gehör, 2012
Ziel der Studie ist das Erfassen der Blickbewegungen und der neurophysiologischen Aktivierungen f... more Ziel der Studie ist das Erfassen der Blickbewegungen und der neurophysiologischen Aktivierungen für verschiedene Lesebedingungen. Methodisch hindert das Einfügen eines Targets in einen Satz die sprachliche Verarbeitung nicht. Die sprachfreie Leseaufgabe aktiviert ebenfalls Hirnareale, die für die Blickbewegungen beim Lesen typisch sind.
Sprache · Stimme · Gehör, 2012
Ziel der Studie ist die Erforschung grundlegender visuomotorischer Prozesse des Lesens noch vor d... more Ziel der Studie ist die Erforschung grundlegender visuomotorischer Prozesse des Lesens noch vor dem eigentlichen Leselernprozess. Die Anwendung der sprachfreien Landolt-Aufgabe konnte zeigen, dass es bereits eine Gruppe von Kindern im Vorschulalter gibt, die leseähnliche Blickbewegungen zeigt.
Eye Guidance in Reading and Scene Perception, 1998
Abstract What determines the location of the next fixation as we move our eyes around the display ... more Abstract What determines the location of the next fixation as we move our eyes around the display in front of us? This question is addressed with reference to the specific activities necessary for reading, for the inspection of two-dimensional pictures and line drawings, and when seeing movement in a three-dimensional display such as a video or in moving around a real world scene in a vehicle. An underlying question here is whether the non-fixated parts of the text or scene can be processed to the extent that the information that is extracted ...
Sprache · Stimme · Gehör, 2014
Sprache · Stimme · Gehör, 2014
Frontiers in Neuroscience, 2014
ABSTRACT Roediger and McDermott (1995) showed that words are falsely recognized, when they provid... more ABSTRACT Roediger and McDermott (1995) showed that words are falsely recognized, when they provide many associated items in the stimulus set. The Associative Read-Out Model (AROM) is the first interactive model with an implemented semantic layer (Hofmann et al., 2011). It suggests that two words are associated, when they co-occur significantly more often together in sentences than predictable by chance (see Hofmann et al., 2011). We conducted a recognition memory task, in which 80 words were presented in a study phase. These studied words had to be discriminated from 80 non-studied (N=33). We crossed this Oldness factor with the number of associated words in a 2x2 rmANOVA design. High co-occurrence words had at least 8 associated words in the stimulus set, and low co-occurrence words less than 8. We not only replicated that high co-occurrence words increased the “yes” response in studied and non-studied words (Hofmann & Jacobs, in press), but we also found a significant interaction of Oldness and Co-occurrence in the reaction times, showing slowest reaction times for high co-occurrence non-studied words and fastest for high co-occurrence studied words. The Event-related potentials recorded from 32-channels during the test phase showed significant Oldness and Co-occurrence main effects for the N400 amplitude. The N400 was smaller for high co-occurrence and studied words and larger for low co-occurrence and non-studied words, which was predicted by the neurobiologically plausible AROM (Hofmann & Jacobs, in press).
Lernen und Lernstörungen, 2013
Reading as a Perceptual Process, 2000
Abstract Models of eye movement control in reading and other complex cognitive tasks need to spec... more Abstract Models of eye movement control in reading and other complex cognitive tasks need to specify the oculomotor, perceptual and cognitive variables that determine when an eye movement is initiated and where it is intended to land. In recent years a large amount of data has accumulated on both aspects of eye guidance, but far less attention has been paid to their interrelations. The dominant view in the literature is that spatial and temporal aspects of eye movement control are independent and need to be accounted for separately. This is ...
Brain research, Jan 24, 2016
Computational models of word recognition already successfully used associative spreading from ort... more Computational models of word recognition already successfully used associative spreading from orthographic to semantic levels to account for false memories. But can they also account for semantic effects on event-related potentials in a recognition memory task? To address this question, target words in the present study had either many or few semantic associates in the stimulus set. We found larger P200 amplitudes and smaller N400 amplitudes for old words in comparison to new words. Words with many semantic associates led to larger P200 amplitudes and a smaller N400 in comparison to words with a smaller number of semantic associations. We also obtained inverted response time and accuracy effects for old and new words: faster response times and fewer errors were found for old words that had many semantic associates, whereas new words with a large number of semantic associates produced slower response times and more errors. Both behavioral and electrophysiological results indicate tha...
Scientific Studies of Reading, Jan 28, 2015
Sprache · Stimme · Gehör, 2012
Ziel der Studie ist das Erfassen der Blickbewegungen und der neurophysiologischen Aktivierungen f... more Ziel der Studie ist das Erfassen der Blickbewegungen und der neurophysiologischen Aktivierungen für verschiedene Lesebedingungen. Methodisch hindert das Einfügen eines Targets in einen Satz die sprachliche Verarbeitung nicht. Die sprachfreie Leseaufgabe aktiviert ebenfalls Hirnareale, die für die Blickbewegungen beim Lesen typisch sind.
Sprache · Stimme · Gehör, 2012
Ziel der Studie ist die Erforschung grundlegender visuomotorischer Prozesse des Lesens noch vor d... more Ziel der Studie ist die Erforschung grundlegender visuomotorischer Prozesse des Lesens noch vor dem eigentlichen Leselernprozess. Die Anwendung der sprachfreien Landolt-Aufgabe konnte zeigen, dass es bereits eine Gruppe von Kindern im Vorschulalter gibt, die leseähnliche Blickbewegungen zeigt.
Eye Guidance in Reading and Scene Perception, 1998
Abstract What determines the location of the next fixation as we move our eyes around the display ... more Abstract What determines the location of the next fixation as we move our eyes around the display in front of us? This question is addressed with reference to the specific activities necessary for reading, for the inspection of two-dimensional pictures and line drawings, and when seeing movement in a three-dimensional display such as a video or in moving around a real world scene in a vehicle. An underlying question here is whether the non-fixated parts of the text or scene can be processed to the extent that the information that is extracted ...
Sprache · Stimme · Gehör, 2014
Sprache · Stimme · Gehör, 2014
Frontiers in Neuroscience, 2014
ABSTRACT Roediger and McDermott (1995) showed that words are falsely recognized, when they provid... more ABSTRACT Roediger and McDermott (1995) showed that words are falsely recognized, when they provide many associated items in the stimulus set. The Associative Read-Out Model (AROM) is the first interactive model with an implemented semantic layer (Hofmann et al., 2011). It suggests that two words are associated, when they co-occur significantly more often together in sentences than predictable by chance (see Hofmann et al., 2011). We conducted a recognition memory task, in which 80 words were presented in a study phase. These studied words had to be discriminated from 80 non-studied (N=33). We crossed this Oldness factor with the number of associated words in a 2x2 rmANOVA design. High co-occurrence words had at least 8 associated words in the stimulus set, and low co-occurrence words less than 8. We not only replicated that high co-occurrence words increased the “yes” response in studied and non-studied words (Hofmann & Jacobs, in press), but we also found a significant interaction of Oldness and Co-occurrence in the reaction times, showing slowest reaction times for high co-occurrence non-studied words and fastest for high co-occurrence studied words. The Event-related potentials recorded from 32-channels during the test phase showed significant Oldness and Co-occurrence main effects for the N400 amplitude. The N400 was smaller for high co-occurrence and studied words and larger for low co-occurrence and non-studied words, which was predicted by the neurobiologically plausible AROM (Hofmann & Jacobs, in press).
Lernen und Lernstörungen, 2013
Reading as a Perceptual Process, 2000
Abstract Models of eye movement control in reading and other complex cognitive tasks need to spec... more Abstract Models of eye movement control in reading and other complex cognitive tasks need to specify the oculomotor, perceptual and cognitive variables that determine when an eye movement is initiated and where it is intended to land. In recent years a large amount of data has accumulated on both aspects of eye guidance, but far less attention has been paid to their interrelations. The dominant view in the literature is that spatial and temporal aspects of eye movement control are independent and need to be accounted for separately. This is ...